6.5　Installation of Oven Port Frames and Nog Plates

6.5.1　The oven port frames shall be subjected to check and acceptance before installation，and shall be in compliance with the following requirements:

1　The size and allowable deviation of oven port frames shall meet the requirements of design documents；

2　Corners around the oven port frames shall be smooth and transitional，and shall not have flanges and acute angles；

3　The contact surface of the oven port frames and the oven port knife edge shall be flat and smooth，and shall not have defects of sand holes，honeycombs，pores，flash，bumps，etc.

6.5.2　The installation of the sealing filler of the oven port frames shall be in compliance with the following requirements:

1　The model，specification and ignition loss of sealing filler shall meet the requirements of design documents，and protective measures are adopted for the sealing filler with good paste；

2　The joint of each layer of sealing filler between the oven port frames and the protective plate shall be staggered，the overlapping length shall be larger than 90.0mm，and the sealing filler shall be tightened and compacted；

3　The amount of compression of the sealing filler of the oven port frames shall meet the requirements of design documents.

6.5.3　The geometric sizes of the oven port frames and protective plate positioning pin shall be checked before the installation of the oven port frames and shall meet the requirements of design documents.

6.5.4　The inner edge of the oven port frames shall not protrude out of the outer edge of the protective plate after the installation of the oven port frames.

6.5.5　The nog plates of the oven port frames shall be fixed，and the elevation of the top surface of the nog plates shall be lower than the bottom surface of the coking chamber.

6.5.6　When the Class A construction technology is adopted，the deformation of the oven port frames does not occur under the pressure.

6.5.7　When the Class A construction technology is adopted，the installation of the oven port frames shall be in compliance with the following requirements:

1　Gap of the oven port frames in the oven bank direction is adjusted，and allowable deviation shall be±2.0mm；

2　The levelness of the nog plate surface is adjusted，and allowable deviation shall be 1/500 of the side length of the nog plate；

3　The elevation of roll bracket is adjusted，allowable deviation shall be±1.0mm，and the difference of left and right elevations of roll bracket is±0.5mm；

4　The stamp mark of the bottom elevation of the coking chamber on the oven port frames and the bottom elevation of the coking chamber are adjusted，and allowable deviation shall be±1mm.

6.5.8　When the Class B construction technology is adopted，the installation of the oven port frames shall be in compliance with the following requirements:

1　Gap of the oven port frames in the oven bank direction is adjusted，and allowable deviation shall be±2.0mm；

2　The perpendicularity of the oven port frames is adjusted，and allowable deviation shall be 4.0mm；

3　The elevation of roll bracket is adjusted，allowable deviation shall be±0.5mm，and the difference of left and right elevations of roll bracket is±0.5mm；

4　The stamp mark of the bottom elevation of the coking chamber on the oven port frames and the bottom elevation of the coking chamber are adjusted，and allowable deviation shall be±1mm.